Chapter 06, 07, and 08 Flashcards
Develop concept incorporating customer needs and expectations.
Idea Generation
Study new ideas for feasibility.
Preliminary Concept Development
Evaluate design alternatives and determining engineering specifications; test prototypes; develop, test, and standardize processes.
Product/Process Development
Distribute to customers.
Market Introduction
Release the product to manufacturing or service delivery teams.
Full-Scale Production
Market evaluation and customer feedback to initiate
continuous improvements.
Market Evaluation
STRUCTURED PRODUCT DEVELOPMENT PROCESS
Idea generation
Preliminary concept development
Product/process development
Full-scale production
Market introduction
Market evaluation
Better designs _______ cost and ________ quality
reduce; improve
Many product failures and service upsets result form _______ design or ________ design processes.
poor; inadequate
___________________ is a process in which all major functions involved with bringing a product to market are continuously involved with product development from conception through sales.
Concurrent engineering
_________________, usually consisting of 4 to 20 members and including every specialty in the company.
Multifunctional teams
Multifunctional teams usually consisting of __ to __ members and including every specialty in the company.
4 to 20
The functions of such teams are to perform and coordinate the activities in the product development process simultaneously, rather than sequentially.
Multifunctional teams
The functions of such teams are to perform and coordinate the activities in the product development process ____________, rather than sequentially.
simultaneously
____________________ represents a structured approach to product development and a set of tools and methodologies for ensuring that goods and services will meet customer needs and achieve performance objectives, and that the processes used to make and deliver them achieve high levels of quality.
Design for Six Sigma (DFSS)
Activities under DFSS
Concept development
Detailed design
Design optimization
Design verification
DFSS Activities’ Process
DMADV - Define, Measure, Analyze, Design, Verify
____________________ is the process of applying scientific, engineering, and business knowledge to produce a basic functional design that meets both customer needs and manufacturing or service delivery requirements.
Concept development
_______________ involves the adoption of an idea, process, technology, product, or business model that is either new or new to its proposed application.
Innovation
Innovation is built upon strong __________________ processes.
research and development (R&D)
_____________ is seeing things in new or novel ways.
Creativity
________________ are designed to help change the context in which one views a problem or opportunity, thereby leading to fresh perspectives.
Creativity tools
Examples of creativity tools
Brainstorming and “brainwriting”
TRIZ, a Russian acronym for the ________________________.
Theory of Inventive Problem Solving
It was developed by a Russian patent clerk who studied thousands of submissions, and observed patterns of innovation common to the evolution of scientific and technical advances.
Theory of Inventive Problem Solving
He recognized that these concepts could be taught, and he developed some 200 exercises to foster ______________________.
creative problem solving
____________________ focuses on establishing technical requirements and specifications, which represent the transition from a designer’s concept to a producible design, while also ensuring that it can be produced economically, efficiently, and with high quality.
Detailed design
___________________ is based on the premise that good design is governed by laws similar to those in natural science.
Axiomatic design
Good design occurs when the functional requirements of the design are independent of one another (Feature Phones).
Independence Axiom
Good design corresponds to minimum complexity (Basic Smart Phones.
Information Axiom
________________ is a planning process to guide the design, manufacturing, and marketing of goods by integrating the voice of the customer throughout the organization.
Quality Function Deployment (QFD)
Through ___________, every design, manufacturing, and control decision is made to meet the expressed needs of customers.
Quality Function Deployment (QFD)
______________ benefits companies through improved communication and teamwork between all constituencies in the value chain, such as between marketing and design, between design and manufacturing, and between manufacturing and quality control.
Quality Function Deployment (QFD)
The Four Linked Houses of Quality
- Customer Requirements; Technical Requirements
- Technical Requirements; Component Characteristics
- Component Characteristics; Process Operations
- Process Operations; Quality Control Plan
The House of Quality
See Page 12 of Chapter 6
BUILDING THE HOUSE OF QUALITY
- Identify customer requirements.
- Identify technical requirements.
- Relate the customer requirements to the technical requirements.
- Conduct an evaluation of competing products or services.
- Evaluate technical requirements and develop targets.
- Determine which technical requirements to deploy in the remainder of the production/delivery process.
Manufacturing specifications consist of _____________ and ___________.
nominal dimensions; tolerances
_____________ refers to the ideal dimension or the target value that manufacturing seeks to meet.
Nominal
_____________ is the permissible variation, recognizing the difficulty of meeting a target consistently.
Tolerance
________________ involves determining the permissible variation in a dimension.
Tolerance design
______________ tend to raise manufacturing costs but they also increase the interchangeability of parts within the plant and in the field, product performance, durability, and appearance.
Narrow tolerances
_______________ increase material utilization, machine throughput, and labor productivity, but have a negative impact on product characteristics
Wide tolerances
TRADITIONAL ECONOMIC VIEW OF CONFORMANCE TO SPECIFICATIONS
See Page 16 of Chapter 6
A Japanese engineer, ______________, maintained that the “goal-post” definition of quality is inherently flawed.
Genichi Taguchi
(T or F) No strict cut-off point divides good quality from poor quality, but that losses occur whenever there is a deviation from the nominal specification.
True
Taguchi measured ________ as the variation from the target value of a design specification, and then translated that variation into an economic “loss function” that expresses the cost of variation in monetary terms.
quality
The ____________ is a quadratic function so that larger deviations from target correspond to increasingly larger losses.
loss function
If the distribution of the variation about the target value is known, the average loss per unit can be computed by finding the expected value of the loss using routine
expected value calculations.
Expected Loss
____________ is defined as the probability that a product, piece of equipment, or system performs its intended function for a stated period of time under specified operating conditions.
Reliability
Key elements of Reliability
- Probability
- Time
- Performance
- Operating conditions
_______________ is the predicted reliability determined by the design of the product or process.
Inherent reliability
_______________ is the actual reliability observed during use.
Achieved reliability
_______________ can be less than the inherent reliability due to the effects of the manufacturing process and the conditions of use.
Achieved reliability
Two types of Failures
- Functional failure
- Reliability failure
Failure that occurs at the start of product life due to manufacturing or material detects
Functional failure
Failure after some period of use
Reliability failure
_________________ are determined during the product design phase
Reliability requirements
(T or F) The designer may use these techniques to determine the effects of adding redundancy, substituting different components, or reconfiguring the design.
True
___________ refers to designing goods and services that are insensitive to variation in manufacturing processes and when consumers use them.
Robust design
____________ is facilitated by design of experiments to identify optimal levels for nominal dimensions and other tools to minimize failures, reduce defects during the manufacturing process, facilitate assembly and disassembly (for both the manufacturer and the customer), and improve reliability.
Robust design
Identification of all the ways in which a failure can occur, to estimate the effect and seriousness of the failure, and to recommend corrective design actions.
Design failure mode and effects analysis (DFMEA)
Elements of DFMEA
- Failure modes
- Effect of the failure on the customer
- Severity, likelihood of occurrence, and detection rating
- Potential causes of failure
- Corrective actions or controls
The _________ is based on how serious the impact would be if the potential failure were to occur.
severity rating
The _________ is based on the probability of the potential failure occurring.
occurrence rating
The _________ is based on how easily the potential failure could be detected prior to occurrence.
detection rating
Based on the severity, likelihood of occurrence, and detection rating, a ___________ is calculated.
risk priority number (RPN)
SCORING RUBRIC FOR DFMEA RATINGS
Severity – the higher the rating, the more severe
Occurrence – the higher the rating, the higher the occurence
Detection – the lower the rating, the higher the detection
Another term for Fault Tree Analysis (FTA)
cause and effect tree analysis
___________________ is a method to describe combinations of conditions or events that can lead to a failure.
Fault Tree Analysis (FTA)
__________________ is composed of conditions or events connected by “and” gates and “or” gates.
cause and effect tree
A cause and effect tree is composed of conditions or events connected by “___” gates and “___” gates.
and; or
An effect with an “____” gate occurs only if all of the causes below it occur.
and
An effect with an “____” gate occurs whenever any of the causes occur.
or
The process of designing a product for efficient production at the highest level of quality
DESIGN FOR MANUFACTURABILITY (DFM)
Example guidelines for DFM
- Minimize number of parts
- Design for robustness
- Eliminate adjustments
- Make assembly easy and foolproof
- Use repeatable, well-understood processes
- Choose parts that can survive process operations
- Design for efficient and adequate testing
- Lay out parts for reliable process completion
- Eliminate engineering changes
The explicit consideration of environmental concerns during the design of products and processes, and includes such practices as designing for recyclability and disassembly.
Design for Environment (DFE)
An emerging concept that includes many design-related initiatives such as concurrent engineering, design for manufacturability, design for assembly, design for environment, and other “design for” approaches
DESIGN FOR EXCELLENCE (DFX)
Principles for DFX
- Constantly thinking in terms of how one can design
or manufacture products better - Focusing on “things done right” rather than “things gone wrong”
- Defining customer expectations and going beyond them
- Optimizing desirable features or results
- Minimizing the overall cost without compromising quality
The purpose of a ______________ is to stimulate discussion, raise questions, and generate new ideas and solutions to help designers anticipate problems before they occur.
design review
run devices until failure occurs
Life testing
overstress devices to reduce time to failure
Accelerated life testing
focused on discovering latent defects that would not otherwise be found through conventional methods
Highly accelerated life testing
the accomplishment of any improvement that takes an organization to unprecedented levels of performance
Breakthrough
__________ attacks chronic losses or, in Deming’s terminology, common causes of variation.
Breakthrough
Breakthrough attacks chronic losses or, in Deming’s terminology, common causes of ___________.
variation
_____________ methodologies and tools provide the foundation for breakthrough as well as modern Six Sigma approaches.
Process improvement
Process improvement methodologies
- Redefining and analyzing the problem
- Generating ideas
- Evaluating and selecting ideas
- Implementing ideas
Collect and organize information, analyze the data and underlying assumptions, and reexamine the problem for new perspectives, with the goal of achieving a workable problem definition.
Redefining and analyzing the problem